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  1. 防災科研関係論文

Fundamental physics activities with pulsed neutron at J-PARC(BL05)

https://nied-repo.bosai.go.jp/records/5987
https://nied-repo.bosai.go.jp/records/5987
cc063fa1-8c0d-4424-b949-f4588f451901
Item type researchmap(1)
公開日 2023-03-30
タイトル
言語 ja
タイトル Fundamental physics activities with pulsed neutron at J-PARC(BL05)
タイトル
言語 en
タイトル Fundamental physics activities with pulsed neutron at J-PARC(BL05)
著者 Kenji Mishima

× Kenji Mishima

ja Kenji Mishima

en Kenji Mishima

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Shogo Awano

× Shogo Awano

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en Shogo Awano

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Yasuhiro Fuwa

× Yasuhiro Fuwa

ja Yasuhiro Fuwa

en Yasuhiro Fuwa

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Fumiya Goto

× Fumiya Goto

ja Fumiya Goto

en Fumiya Goto

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Christopher C. Haddock

× Christopher C. Haddock

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en Christopher C. Haddock

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Masahiro Hino

× Masahiro Hino

ja Masahiro Hino

en Masahiro Hino

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Masanori Hirose

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ja Masanori Hirose

en Masanori Hirose

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Katsuya Hirota

× Katsuya Hirota

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Sei Ieki

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Sohei Imajo

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Takashi Ino

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Yoshihisa Iwashita

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Ryo Katayama

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Hiroaki Kawahara

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Masaaki Kitaguchi

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Ryunosuke Kitahara

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Jun Koga

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Aya Morishita

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Tomofumi Nagae

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Naoki Nagakura

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Naotaka Naganawa

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Noriko Oi

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Hideyuki Oide

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Hidetoshi Otono

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Yoshichika Seki

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Daiichiro Sekiba

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Tatsushi Shima

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Hirohiko M. Shimizu

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William M. Snow

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Naoyuki Sumi

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Hirochika Sumino

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Satomi Tada

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Kaoru Taketani

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Seiji Tasaki

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Tatsuhiko Tomita

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Atsuhiro Umemoto

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Takahito Yamada

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Satoru Yamashita

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Mami Yokohashi

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Tamaki Yoshioka

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抄録
内容記述タイプ Other
内容記述 &quot;Neutron Optics and Physics (NOP/ BL05)&quot; at MLF in J-PARC is a beamline for<br />
studies of fundamental physics. The beamline is divided into three branches so<br />
that different experiments can be performed in parallel. These beam branches<br />
are being used to develop a variety of new projects. We are developing an<br />
experimental project to measure the neutron lifetime with total uncertainty of<br />
1 s (0.1%). The neutron lifetime is an important parameter in elementary<br />
particle and astrophysics. Thus far, the neutron lifetime has been measured by<br />
several groups; however, different values are obtained from different<br />
measurement methods. This experiment is using a method with different sources<br />
of systematic uncertainty than measurements conducted to date. We are also<br />
developing a source of pulsed ultra-cold neutrons (UCNs) produced from a<br />
Doppler shifter are available at the unpolarized beam branch. We are developing<br />
a time focusing device for UCNs, a so called &quot;rebuncher&quot;, which can increase<br />
UCN density from a pulsed UCN source. At the low divergence beam branch, an<br />
experiment to search an unknown intermediate force with nanometer range is<br />
performed by measuring the angular dependence of neutron scattering by noble<br />
gases. Finally the beamline is also used for the research and development of<br />
optical elements and detectors. For example, a position sensitive neutron<br />
detector that uses emulsion to achieve sub-micrometer resolution is currently<br />
under development. We have succeeded in detecting cold and ultra-cold neutrons<br />
using the emulsion detector.
言語 ja
抄録
内容記述タイプ Other
内容記述 &quot;Neutron Optics and Physics (NOP/ BL05)&quot; at MLF in J-PARC is a beamline for<br />
studies of fundamental physics. The beamline is divided into three branches so<br />
that different experiments can be performed in parallel. These beam branches<br />
are being used to develop a variety of new projects. We are developing an<br />
experimental project to measure the neutron lifetime with total uncertainty of<br />
1 s (0.1%). The neutron lifetime is an important parameter in elementary<br />
particle and astrophysics. Thus far, the neutron lifetime has been measured by<br />
several groups; however, different values are obtained from different<br />
measurement methods. This experiment is using a method with different sources<br />
of systematic uncertainty than measurements conducted to date. We are also<br />
developing a source of pulsed ultra-cold neutrons (UCNs) produced from a<br />
Doppler shifter are available at the unpolarized beam branch. We are developing<br />
a time focusing device for UCNs, a so called &quot;rebuncher&quot;, which can increase<br />
UCN density from a pulsed UCN source. At the low divergence beam branch, an<br />
experiment to search an unknown intermediate force with nanometer range is<br />
performed by measuring the angular dependence of neutron scattering by noble<br />
gases. Finally the beamline is also used for the research and development of<br />
optical elements and detectors. For example, a position sensitive neutron<br />
detector that uses emulsion to achieve sub-micrometer resolution is currently<br />
under development. We have succeeded in detecting cold and ultra-cold neutrons<br />
using the emulsion detector.
言語 en
書誌情報 en : Proceedings of the International Conference on Neutron Optics (NOP2017)

発行日 2017-12-18
出版者
言語 en
出版者 Journal of the Physical Society of Japan
DOI
関連識別子 10.7566/JPSCP.22.011033
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